Water purifier waterway system with double backflow waterways
By combining dual-membrane reflux and pure water reflux in the dual-reflux water path system, the problem of long pure water reflux rinsing time and large water volume in water purifiers is solved, achieving a highly efficient water purification effect and reducing the TDS value of the first cup of water.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-21
- Publication Date
- 2026-03-31
AI Technical Summary
Existing water purifiers' pure water recirculation rinsing technology suffers from long rinsing times, high water consumption, and mediocre results, failing to effectively reduce the TDS value of the first cup of water.
The system employs a dual-recirculation water path system, combining dual-membrane recirculation and pure water recirculation flushing methods. The opening sequence of the inlet valve and check valve is controlled by the control module to achieve efficient flushing of the RO filter element.
It saves water and improves rinsing effect, resulting in a significant reduction in the TDS value of the first cup of water and achieving a better water purification effect.
Smart Images
Figure CN224062592U_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the technical field of water purifier water circuit systems, specifically relating to a water purifier water circuit system with dual return water circuits. Background Technology
[0002] Traditional water purifiers are mostly non-pure water recirculation purifiers. Therefore, when the water purifier is turned off, the water inlet is blocked and the booster pump stops running. Because the pressure before and after the RO membrane is inconsistent, forward osmosis is involved, which makes the TDS concentration of the water before and after the membrane the same. However, the concentration before the membrane is dozens of times higher than that after the membrane. This causes the water with a high TDS value before the RO membrane to permeate to the pure water side. After equilibrium is reached, the first glass of water you drink will have a very high TDS concentration.
[0003] Therefore, most existing water purifiers use pure water recirculation flushing technology. The principle is as follows: raw tap water is purified by a PCB composite filter, then pressurized by the first inlet valve and pump, and finally filtered through the RO membrane to produce pure water (high-concentration wastewater flows out through the wastewater valve, while some wastewater remains inside the filter). This pure water then mixes with the raw water that has passed through the PCB composite filter after passing through inlet valve 2 and a check valve, and then flushes the pre-membrane section (high-concentration wastewater before the membrane) of the RO membrane. The flushing water is discharged through the wastewater valve, thus transforming the high-concentration wastewater before the membrane into low-concentration raw water or pure water. However, the disadvantages of pure water recirculation flushing technology are that it has a long flushing time, consumes a lot of water, is not energy-efficient, and has only moderate effectiveness, failing to achieve a very low TDS value for the first cup of water dispensed from the purifier. Utility Model Content
[0004] The purpose of this invention is to overcome the problems of existing water purifiers using pure water reflux rinsing technology, such as long pre-rinsing time for the RO membrane, high water consumption, lack of energy saving, and mediocre effect. The invention provides a water purifier water circuit system with dual reflux water circuits that saves water and has a good rinsing effect.
[0005] To achieve the above objectives, the present invention adopts the following technical solution:
[0006] The water purifier's water circuit system with dual reflux water paths includes a composite filter element, a dual-membrane reflux water path, a pure water reflux water path, and a control module. The composite filter element includes a PC filter element and a first RO filter element. The PC filter element has a raw water inlet and a first purified water outlet, while the first RO filter element has a first purified water inlet and a pure water outlet. The dual-membrane reflux water path includes a first inlet valve, a pump body, a second inlet valve, a third inlet valve, a first check valve, and a second RO filter element. The second RO filter element has a second purified water inlet and a pure water outlet. The first inlet valve is connected to the first purified water outlet and the pump body input via water paths. The third inlet valve is connected to the pump body output and the second purified water inlet of the second RO filter element via water paths. The second inlet valve is connected to the first purified water inlet and the water path between the pump body and the third inlet valve via water paths. The first check valve is connected to the pure water outlet and the third inlet valve and the second purified water inlet via water paths. The system is interconnected; the first inlet valve, the third inlet valve, and the pump body open simultaneously, allowing the tap water input from the raw water inlet to be purified and filtered through the PC filter and the second RO filter before being discharged as pure water from the pure water outlet. The first inlet valve, the second inlet valve, and the pump body open simultaneously, allowing the tap water input from the raw water inlet to be purified and filtered through the PC filter and the first RO filter before being flushed before the RO membrane of the second RO filter. The pure water return path includes a second check valve and a fourth inlet valve. The pure water flow path at the pure water outlet is connected to the water path between the first inlet valve and the pump body via the fourth inlet valve and the second check valve. The first inlet valve, the second inlet valve, the fourth inlet valve, and the pump body open simultaneously, allowing the pure water discharged from the pure water outlet to mix with the raw water filtered by the PC filter before being flushed before the RO membrane of the second RO filter. The control module is electrically connected to each inlet valve and check valve.
[0007] Compared with existing technologies, the dual-recirculation water system of this utility model, by setting up a dual-membrane recirculation water system and a pure water recirculation water system inside the water system, allows the water purifier to simultaneously perform dual-membrane recirculation rinsing and pure water recirculation rinsing on the RO membrane of the second RO filter. Since the pure water recirculation rinsing uses a partial pure water mixed with the PC filter's purified water, it features a large water output but a low TDS value. Conversely, the dual-membrane recirculation rinsing uses completely pure water, resulting in a smaller water output and an even lower TDS value. Therefore, the control module can first use a short-duration pure water recirculation rinsing combined with a dual-membrane recirculation rinsing to rinse the RO membrane of the second RO filter, achieving a water-saving and effective rinsing method, resulting in a very low TDS value for the first cup of water dispensed from the water purifier.
[0008] Furthermore, it also includes a wastewater path. The first RO filter element is provided with a first wastewater outlet, and the second RO filter element is provided with a second wastewater outlet. The first wastewater outlet is connected to the wastewater path through a first wastewater valve, and the second wastewater outlet is connected to the wastewater path through a second wastewater valve. With this configuration, the wastewater generated by the first RO filter element and the second RO filter element can be discharged centrally and uniformly through the wastewater path.
[0009] Furthermore, the pure water outlet is connected to a pure water discharge path via a high-pressure switch, and a faucet is connected to the outer end of the pure water discharge path. The pure water diversion path is connected to the pure water discharge path. Attached Figure Description
[0010] Figure 1 This is a schematic diagram illustrating the principle of pure water reflux flushing technology used in existing water purifiers.
[0011] Figure 2 This is a schematic diagram of a water purifier system with dual-return water paths.
[0012] Labeling Explanation: PC filter element 11, First RO filter element 12, Raw water inlet 111, First purified water outlet 112, First purified water inlet 121, Pure water outlet 122, Composite filter element 1, Dual membrane reflux water path 2, First inlet valve 21, Pump body 22, Second inlet valve 23, Third inlet valve 24, First check valve 25, Second RO filter element 26, Second purified water inlet 261, Pure water outlet 262, Pure water reflux water path 3, Second check valve 31, Fourth inlet valve 32, Wastewater path 4, First wastewater outlet 41, Second wastewater outlet 42, First wastewater valve 43, Second wastewater valve 44, Pure water discharge water path 27, Pure water diversion water path 28. Detailed Implementation
[0013] The specific embodiments of this utility model are described below with reference to the accompanying drawings. In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0014] See Figure 2 The water system of the water purifier with dual reflux water path of this utility model includes a composite filter element 1, a dual membrane reflux water path 2, a pure water reflux water path 3, and a control module.
[0015] The composite filter element 1 includes a PC filter element 11 and a first RO filter element 12. The PC filter element 11 is provided with a raw water inlet 111 and a first purified water outlet 112, and the first RO filter element 12 is provided with a first purified water inlet 121 and a pure water outlet 122.
[0016] The dual-membrane reflux water circuit 2 includes a first inlet valve 21, a pump body 22, a second inlet valve 23, a third inlet valve 24, a first check valve 25, and a second RO filter element 26. The second RO filter element 26 has a second purified water inlet 261 and a pure water outlet 262. The first inlet valve 21 is connected to the first purified water outlet 112 and the input end of the pump body 22 via water passages. The third inlet valve 24 is connected to the output end of the pump body 22 and the second purified water inlet 261 of the second RO filter element 26 via water passages. The second inlet valve 23 is connected to the first purified water inlet 112 and the water passage between the pump body 22 and the third inlet valve 24 via water passages. The first check valve 25 is connected to the pure water outlet 122 and the third inlet valve 24 via water passages. The system is connected to the second purified water inlet 261. When the first inlet valve 21, the third inlet valve 24, and the pump body 22 are opened simultaneously and the tap at the pure water outlet 262 is closed, the tap water input from the raw water inlet 111 is purified and filtered by the PC filter element 11 and the second RO filter element 26, and then flows through the pump body 22 and the third inlet valve 24 in sequence and is discharged from the pure water outlet 262. When the first inlet valve 21, the second inlet valve 23, and the pump body 22 are opened simultaneously and the tap at the pure water outlet 262 is closed, the tap water input from the raw water inlet 111 is purified and filtered by the PC filter element 11 and the first RO filter element 12, and then is discharged through the first one-way valve 25 to rinse the RO membrane of the second RO filter element 26.
[0017] The pure water return path 3 includes a second check valve 31 and a fourth inlet valve 32. The pure water flow path 28 of the pure water outlet 262 is connected to the water path between the first inlet valve 21 and the pump body 22 through the fourth inlet valve 32 and the second check valve 31 in sequence. When the first inlet valve 21, the second inlet valve 23, the fourth inlet valve 32 and the pump body 22 are opened at the same time and the tap of the pure water outlet 262 is closed, the pure water discharged from the pure water outlet 262 is mixed with the raw water filtered by the PC filter element 11 and then rinsed in front of the RO membrane of the second RO filter element 26.
[0018] The control module is electrically connected to each inlet valve, pump body 22, wastewater valve and check valve respectively.
[0019] Compared with the prior art, the water purifier water circuit system of this utility model with dual reflux water circuits, by setting up a dual membrane reflux water circuit 2 and a pure water reflux water circuit 3 inside the water purifier water circuit system, allows the water purifier to simultaneously perform dual membrane reflux rinsing and pure water reflux rinsing on the RO membrane pre-rinsing of the second RO filter element 26. Since the pure water reflux rinsing uses a partial pure water mixed with the PC filter element 11 for rinsing, it has the characteristics of large water output but low water TDS value. And the dual membrane reflux rinsing uses a completely pure water rinsing method, which has the characteristics of small water output and even lower water TDS value. Thus, the control module can first use a short pure water reflux rinsing combined with dual membrane reflux rinsing to rinse the RO membrane pre-rinse of the second RO filter element 26, achieving a rinsing method that saves water and has a good rinsing effect, so that the TDS value of the first cup of water from the water purifier is very low.
[0020] In one embodiment, a wastewater passage 4 is also included. The first RO filter element 12 is further provided with a first wastewater outlet 41, and the second RO filter element 26 is further provided with a second wastewater outlet 42. The first wastewater outlet 41 is connected to the wastewater passage 4 through a first wastewater valve 43, and the second wastewater outlet 42 is connected to the wastewater passage 4 through a second wastewater valve 44. With this arrangement, the wastewater generated by the first RO filter element 12 and the second RO filter element 26 can be discharged centrally and uniformly through the wastewater passage 4.
[0021] In one embodiment, the pure water outlet 262 is connected to a pure water discharge channel 27 via a high-pressure switch, and a faucet is connected to the outer end of the pure water discharge channel 27. The pure water diversion channel 28 is connected to the pure water discharge channel 27.
[0022] Based on the disclosure and teachings of the above specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, this utility model is not limited to the specific embodiments disclosed and described above, and some modifications and changes to this utility model should also fall within the protection scope of the claims of this utility model. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on this utility model.
Claims
1. A waterway system of a water purifier of a double reflux waterway, characterized in that, The utility model relates to a water purifier, including: The composite filter element includes a PC filter element and a first RO filter element, the PC filter element is provided with a raw water inlet and a first clean water outlet, and the first RO filter element is provided with a first clean water inlet and a pure water outlet; The double-membrane backflow water circuit includes a first water inlet valve, a pump body, a second water inlet valve, a third water inlet valve, a first check valve and a second RO filter element, the second RO filter element is provided with a second clean water inlet and a pure water discharge outlet, the first water inlet valve is connected with the first clean water outlet and the pump body input end through a water circuit respectively, the third water inlet valve is connected with the pump body output end and the second clean water inlet of the second RO filter element through a water circuit respectively, the second water inlet valve is communicated with the first clean water inlet and the water circuit between the pump body and the third water inlet valve through a water circuit, and the first check valve is communicated with the pure water outlet and the third water inlet valve and the second clean water inlet through a water circuit respectively; the first water inlet valve, the third water inlet valve and the pump body are simultaneously opened, so that the tap water input from the raw water inlet is purified and filtered through the PC filter element and the second RO filter element and then discharged from the pure water discharge outlet as pure water, the first water inlet valve, the second water inlet valve and the pump body are simultaneously opened, so that the tap water input from the raw water inlet is purified and filtered through the PC filter element and the first RO filter element and then washes the front of the RO membrane of the second RO filter element; The pure water backflow water circuit includes a second check valve and a fourth water inlet valve, and the pure water shunt water circuit of the pure water discharge outlet is communicated with the water circuit between the first water inlet valve and the pump body through the fourth water inlet valve and the second check valve in sequence; the first water inlet valve, the second water inlet valve, the fourth water inlet valve and the pump body are simultaneously opened, so that the pure water discharged from the pure water discharge outlet is mixed with the raw water filtered through the PC filter element and then washes the front of the RO membrane of the second RO filter element; The control module is electrically connected with each water inlet valve and check valve.
2. The dual-reverse-flow waterway purifier waterway system according to claim 1, characterized in that, The utility model further includes a wastewater water circuit, the first RO filter element is further provided with a first wastewater outlet, the second RO filter element is further provided with a second wastewater outlet, the first wastewater outlet is communicated with the wastewater water circuit through a first wastewater valve, and the second wastewater outlet is communicated with the wastewater water circuit through a second wastewater valve.
3. The dual-reverse-flow waterway purifier waterway system according to claim 1, characterized in that, The pure water discharge water circuit is connected with a water tap at the outer end of the pure water discharge water circuit.